Capacity of any water Tank may be found using
following basic formula.
Capacity in Gallons = Volume of Tank X 7.4813
1 Cubic Foot volume may contain 7.4813 US Gallons
Rectangular Tank = Volume x
7.4813 US Gallons
= Length x Width
x Depth x 7.4813
Suppose we have water tank having size of 10 ft
x 5ft x 5ft
= 10X5X5X7.4813=
1870.32 Gallons
Cylindrical Tank = Volume x 7.4813 US Gallons
=( πxDxD)/4 x Height x 7.4813
Suppose we have a tank whose
diameter is 10 ft and height is 7 ft .
= (3.14 x
10x10) /(4) x7 x7.4813 = 4110.97 US Gallons.
Square Tanks = Volume x 7.4813 US Gallons
=Length x
Width x Height x 7.4813
Suppose we have water tank having size of 10 ft
x 10ft x 5ft
= 10x10x5x7.4813
= 3740.65 US Gallons.
Polygon Shape Tank Capacity =(
N.a^2)/4. Cot ϴ x Height x 7.4813
Here N = number of sides
a = Length of each side
ϴ = 180 / Number of Sides
Cot = Cos / Sin
Suppose we have a water tank which
has octagonal base having 3 ft length of each side and height is 10 ft.
= 8 x (3^2)/4 xCos (180/8) /Sin (180/8)
x 10 X 7.4813
= 18X2.4142X10X7.4813= 3251.04 US Gallons
